diff options
| -rw-r--r-- | src/libstore/normalise.cc | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/libstore/normalise.cc b/src/libstore/normalise.cc index 51f90207ead3..5c13f04ecbfd 100644 --- a/src/libstore/normalise.cc +++ b/src/libstore/normalise.cc @@ -287,6 +287,12 @@ void ensurePath(const Path & path, PathSet pending) { /* If the path is already valid, we're done. */ if (isValidPath(path)) return; + + if (pending.find(path) != pending.end()) + throw Error(format( + "path `%1%' already being realised (possible substitute cycle?)") + % path); + pending.insert(path); /* Otherwise, try the substitutes. */ Paths subPaths = querySubstitutes(path); @@ -296,7 +302,8 @@ void ensurePath(const Path & path, PathSet pending) { checkInterrupt(); try { - normaliseStoreExpr(*i, pending); + Path nf = normaliseStoreExpr(*i, pending); + realiseClosure(nf, pending); if (isValidPath(path)) return; throw Error(format("substitute failed to produce expected output path")); } catch (Error & e) { |